I know, I run my own company, so I'm aware of taxes when transferring money between two companies, etc. I was only worried about the fact that bank gets some small percentage of money when recalculating between currencies, so I would rather skip the double currency change (eur -> pln -> eur) as it is pointless. Now when I think of it, I could even sign some sort of paper (and sent it to GDC using snail mail maybe?) that I don't want my money back by bank transfer, but I e.g. give permission to person XXX (let's say Joerg ) to collect my money in person and another paper stating that I give him permission to put my money to "Neo900 gmbh-or-something". By the way, when giving refunds - what about VAT tax? Let's say I paid 1 euro to GDC, part of it was VAT tax - will the refund be lowered by the VAT amount or will the full 1 euro be refunded (I'm totally skipping the part about lowering the refund by the cost of prototypes and designs so far, I know, but this is irrelevant in this question)? And can somehow the double VAT be skipped (it was paid once by GDC, now it will be paid again by "Neo900 gmbh-or-something", oh god I love taxes...)? If it cannot be skipped anyway, what is the tax difference between direct GDC-"neo900" money transfer and money transfer with buyer-in-the-middle? (if that is irrelevant to this thread, feel free to post me a pm, I have near zero knowledge about german tax law and I'm just curious)